The internet is my favorite place to shop because of the unbeatable deals on everything from books to pet supplies. The trade-off is that you don’t get to see the products you’re buying in person and the companies selling these products are largely unregulated.

This week retailer, Petspace LLC, agreed to pay a penalty to the United States to settle allegations that it sold repackaged Frontline Plus on eBay. The online sale of the non-prescription flea and tick preventative has become so popular that the EPA has guidelines on how to spot counterfeit packaging on its website.

I buy all of my prescription medicine through my veterinarian (or at my local pharmacy), but I do buy Frontline Plus online. Since the topical medication is applied year round, in a multiple dog household, the cost adds up fast.